How large a number can I convert?

The tool uses JavaScript BigInt, so it supports numbers of virtually unlimited size — far beyond the 64-bit limit of regular numbers.

What characters are valid for each base?

Binary: 0-1. Octal: 0-7. Decimal: 0-9. Hexadecimal: 0-9 and A-F (case insensitive).

Does it handle negative numbers?

Currently the tool supports non-negative integers. For negative numbers, convert the absolute value and apply the sign or two's complement manually.

What is the Text to Binary section?

It converts each character of your text into its ASCII decimal value, 8-bit binary, and 2-digit hex representation — useful for understanding character encoding.

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Binary, Hex & Octal Converter

Convert numbers between binary, decimal, octal, and hexadecimal instantly.

Number Base Converter

Convert between decimal, binary, octal, and hexadecimal in real time. Supports arbitrarily large numbers.

Quick examples

Decimal (Base 10)

Binary (Base 2)

Octal (Base 8)

Hexadecimal (Base 16)

Text to Binary / Hex

How to Use Binary, Hex & Octal Converter

1
Type a number in any field (decimal, binary, octal, or hex).
2
All other fields update instantly in real time.
3
Use quick example chips to explore common values.
4
Check the info cards for bit count, nibble/byte grouping, and size fit.
5
Use the Text to Binary section to see character codes for any text.

About Binary, Hex & Octal Converter

Convert numbers between binary (base 2), decimal (base 10), octal (base 8), and hexadecimal (base 16) in real time. Type in any field and all other representations update instantly — no button clicks needed.

Supports arbitrarily large numbers using BigInt. See bit-level details including nibble and byte groupings, total bits needed, and whether the number fits in 8-bit, 16-bit, 32-bit, or 64-bit. Quick example chips let you explore common values like 255, 1024, and 65535.

Also includes a Text to Binary section: type any text and see each character's ASCII code, binary, and hex representation in a neat table. Perfect for programmers, students, and anyone working with number systems.